Upstage: Solar Mini 4 vs AionLabs: Aion 3.5: Live Promos, Pricing, Hidden Fees & Latency
Verified 2026 FinOps benchmark comparing Upstage: Solar Mini 4 (upstage/solar-mini4) vs AionLabs: Aion 3.5 (aion-labs/aion-3.5). Simulate cache read multipliers, context cliffs, MAU bills, and P90 latency.
Upstage: Solar Mini 4 (upstage/solar-mini4) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for Upstage: Solar Mini 4: Activate ephemeral prefix caching to slash input costs by 50% (down to $0.025/1M) or route via asynchronous Batch API for 50% off standard token rates.
AionLabs: Aion 3.5 (aion-labs/aion-3.5) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for AionLabs: Aion 3.5: Activate ephemeral prefix caching to slash input costs by 50% (down to $1.5/1M) or route via asynchronous Batch API for 50% off standard token rates.
In Etuki October 2026 FinOps telemetry comparing Upstage: Solar Mini 4 (API ID: upstage/solar-mini4) vs AionLabs: Aion 3.5 (API ID: aion-labs/aion-3.5), Upstage: Solar Mini 4 offers lower standard input pricing at $0.05/1M tokens ($0.2/1M output), while Upstage: Solar Mini 4 leads in cached prefix economics at $0.025/1M tokens (50% discount). Upstage: Solar Mini 4 achieves a 0ms faster P90 time-to-first-token latency (280ms vs 280ms).
Auto-discovered via live global telemetry registry.
Auto-discovered via live global telemetry registry.
| Specification / FinOps Dimension | Upstage: Solar Mini 4 | AionLabs: Aion 3.5 | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | upstage/solar-mini4 | aion-labs/aion-3.5 | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $0.05 / $0.2 | $3 / $6 | Upstage: Solar Mini 4 |
| Cache Read Price (per 1M) | $0.025/1M (50% Off) | $1.5/1M (50% Off) | Upstage: Solar Mini 4 |
| Context Window / Max Output | 512K In / 128K Out | 256K In / 32K Out | Upstage: Solar Mini 4 |
| P90 First-Token / Edge Latency | 280ms | 280ms | Upstage: Solar Mini 4 (-0ms) |
Solar Mini 4 is Upstage's compact, cost-efficient language model, a 35B-parameter mixture-of-experts with 3B active parameters and a 524K context window. It is built for agentic us
Aion 3.5 is a multi-model roleplaying and storytelling system from AionLabs, built on the GLM family of models. It uses a collaborative generation process in which multiple special
Real-Time Stack Cost & Hidden-Fee Simulator (MAU / Token / Egress / GMV)
Calibrated with Reddit r/FinOps & r/devops telemetry: Includes Context Caching, Bandwidth Egress, and MoR Tax
🛰️Switch from Upstage: Solar Mini 4 to AionLabs: Aion 3.5
Aion 3.5 is a multi-model roleplaying and storytelling system from AionLabs, built on the GLM family of models. It uses a collaborative generation process in which multiple special Verified P90 latency of 280ms.